<!-- 登陆页面 -->
<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
//控制注册和登录表单的显示，默认显示登录
const isRegister = ref(false)

// 用于注册的数据模型
const registerData = ref({
  username: '',
  password: '',
  rePassword: '',
})
// 自定义确认密码的校验函数
const rePasswordValid = (rule, value, callback) => {
  if (value == null || value === '') {
    return callback(new Error("请再次确认密码"))
  }
  else if (value !== registerData.value.password) {
    return callback(new Error("两次输入的密码不一致"))
  }
  else { callback() }
}
// 注册表单校验规则
const registerDataRules = ref({
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 3, max: 16, message: '长度为3~16位非空字符', trigger: 'blur' },
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    { min: 6, max: 16, message: '长度为6~16位非空字符', trigger: 'blur' },
  ],
  rePassword: [{ validator: rePasswordValid, trigger: 'blur' }]
})

import { userRegisterService, userLoginService } from '@/api/user';
import { ElMessage } from 'element-plus'
// 用于注册的事件函数
const register = async () => {
  if (registerData.value.password !== registerData.value.rePassword) {
    return
  }
  //registerData是响应式数据，需要用.value获取值
  let result = await userRegisterService(registerData.value)
  if (result.code === 0) {
    ElMessage({ message: '注册成功', type: 'success' })
  } else {
    ElMessage.error(result.message ? result.message : '注册失败')
  }
}

import { useRouter } from 'vue-router'
import {useTokenStore} from '@/stores/token'
//调用useTokenStore得到状态
const tokenStore = useTokenStore()
// 定义router, 用于跳转到注册页面
const router = useRouter()
// 用于登录的事件函数
const login = async () => {
  let res = await userLoginService(registerData.value)
    //添加token
    tokenStore.setToken(res.data)
    
    ElMessage.success('登录成功!')
    //跳转到首页  路由完成操作
    router.push('/man/books')
}

// 复用注册表单，当点击注册或登录按钮时清空数据模型中的数据
const clearRegisterData = () => {
  registerData.value = {
    username: '',
    password: '',
    rePassword: '',
  }
}

</script>

<template>
  <el-row class="login-page">
    <el-col :span="14" class="bg"></el-col>
    <el-col :span="6" :offset="2" class="form">
      <!-- 注册表单 -->
      <el-form ref="form" size="large" autocomplete="off" :rules="registerDataRules" :model="registerData"
        v-if="isRegister">
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
        </el-form-item>
        <el-form-item prop="rePassword">
          <el-input :prefix-icon="Lock" type="password" placeholder="请再次输入密码"
            v-model="registerData.rePassword"></el-input>
        </el-form-item>
        <!-- 注册按钮 -->
        <el-form-item>
          <el-button class="button" type="primary" auto-insert-space @click="register">
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false, clearRegisterData()">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <!-- 登录表单 -->
      <el-form ref="form" size="large" autocomplete="off" :rules="registerDataRules" :model="registerData" v-else>
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码"
            v-model="registerData.password"></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码?</el-link>
          </div>
        </el-form-item>
        <!-- 登录按钮 -->
        <el-form-item>
          <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true, clearRegisterData()">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
/* 样式 */
.login-page {
  height: 100vh;
  background-color: #fff;

  .bg {
    background: url('@/assets/logo3.png') no-repeat 50% center / 280px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }

  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;

    .title {
      margin: 0 auto;
    }

    .button {
      width: 100%;
    }

    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>